:tada:gin的cors跨域中间件

cors.go

@@ -0,0 +1,34 @@
+package gin_cors
+
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+)
+
+type Cors struct {
+	AccessControlAllowOrigins     []string
+	AccessControlAllowHeaders     string
+	AccessControlAllowMethods     string
+	AccessControlExposeHeaders    string
+	AccessControlAllowCredentials string
+}
+
+func (cors *Cors) CorsMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		for _, v := range cors.AccessControlAllowOrigins {
+			if v == c.Request.Header.Get("Origin") {
+				c.Writer.Header().Set("Access-Control-Allow-Origin", v)
+				c.Writer.Header().Set("Access-Control-Allow-Headers", cors.AccessControlAllowHeaders)
+				c.Writer.Header().Set("Access-Control-Allow-Methods", cors.AccessControlAllowMethods)
+				c.Writer.Header().Set("Access-Control-Expose-Headers", cors.AccessControlExposeHeaders)
+				c.Writer.Header().Set("Access-Control-Allow-Credentials", cors.AccessControlAllowCredentials)
+			}
+		}
+
+		if c.Request.Method == http.MethodOptions {
+			c.AbortWithStatus(http.StatusNoContent)
+		}
+
+		c.Next()
+	}
+}